Efecto de la funcionalización con polianilina de la SBA-15 y carbonizado de hueso en la adsorción de fenol desde solución acuosa

Abstract

The mesoporous materials were prepared from bone and the other by the synthesis of an aluminum silicon, in this particular case a SBA-15, with which studied the variation of the adsorption capacity functionalized with polyaniline using aniline and ammonium persulfate as the modifying agent and oxidant at 0 ° C. for the mesoporous materials prepared in this work SBA-15, SBA-15 / PA, bone char and bone char / PA are obtained with areas between 654, 215, 100 and 57 m2 / g and their diameter average pore of 5.28, 6.08, 9.43 and 4.84 nm respectively. The significant change in the surface area was analyzed with fourier transform infrared spectroscopy (FTIR), acidity-basicity, Point of zero charge(PZC) and thermal stability of the materials through thermogravimetric analysis (TGA). The studies of adsorption kinetics show a balance of 54h to 58h and are the model by the pseudo second order model. From these tests, the isotherms of the aqueous solution were established to demonstrate the increase in the adsorption capacity of phenol for the materials operated, with SBA-15 / PA being the best adsorbent (273 mg / g). Finally, it is determined that the Redlich-Peterson model is best fitted to the experimental data obtained for SBA-15, bone char and bone char/ PA and the Langmuir model for the SBA-15 / PA evidenced in the correlation values.